JPS581664Y2 - Engine starting aid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting assist device for engines, particularly water-cooled engines.

BACKGROUND OF THE INVENTION The technical concept of providing an electric heating element in a cooling water passage to improve the starting of a water-cooled engine to bring the cooling water to an appropriate temperature before starting is known in the art.

By the way, regarding the installation location of the electric heating body, it has been proposed to install it in the cooling water passage outside the engine body and to install it in the cooling water passage inside the engine body. Since the engine body and the electric heating element are separated from each other, thermal efficiency is poor, and the latter structure is preferable in order to achieve the original purpose.

However, when adopting the latter structure, the electric heating element must be inserted into the engine block from the outer wall of the cooling water passage and fixed, and various mounting methods and structures have been proposed as follows. However, both have practical drawbacks.

For example, as shown in FIG. 1, a pipe threaded part 3 is provided on the stopper 2 that supports the electric heating element 1, and this is screwed into a threaded part (not shown) provided on the engine block side. structure, or as shown in FIG.
A structure in which a hole 2'a for attaching a screw is provided and the screw is used to attach the engine block to the engine block has the disadvantage that the number of man-hours required for the machining process is increased due to screw machining, particularly the screw machining on the engine block side.

Further, as shown in FIG. 3, a stopper 4 supporting the electric heating element 1
In a structure in which a crimp ring 7 consisting of an O-ring 5 and a wedge ring 6 is fitted into the fitting part of the engine block, and the crimp ring 7 is attached to the engine block using the crimp force, the crimp ring may be damaged due to engine vibrations, etc. Even if 7 is slightly loosened, cooling water may leak, and if this is not noticed, the engine may burn out.

Furthermore, as shown in Fig. 4,
In what is disclosed in the publication, a bolt/nut 12 with a two-point fixing hook member 11 inserted from the outer wall surface 10b of the plug body 10 is inserted into the inner wall surface 10a side of the plug body 10 that supports the electric heating element 1.
As shown in FIG. 5, by tightening the bolt/nut 12, the engine block A mounting structure for clamping the cooling water passage outer wall 13 is shown.

In this case, the length of the two-point hook member 11 is larger than the diameter of the through hole 14, so when inserting the two-point hook member 11, it is necessary to swing the electric heating element 1 and the plug body 10 significantly. The insertion operation is difficult, and the shape of the electric heating element 1 itself is subject to significant restrictions.

The present invention was developed in view of the drawbacks of the conventional devices, and has a simple structure, is easy to assemble, and can be securely fixed, and the shape of the electric heating element can be adjusted depending on the assembly structure. It is an object of the present invention to provide an engine starting aid device that does not suffer from ff1lli.

For this reason, in the present invention, a stop shaft having a threaded portion is inserted at a position eccentric to the center of the plug, and a cantilevered hook is screwed into the threaded portion, while the rotation of the hook is The basic feature is that by providing a locking member to prevent this and tightening the ratio axis, the outer wall is held between the enlarged part provided on the outer wall surface of the plug body and the cantilever type hook.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

In FIG. 6, reference numeral 20 denotes a plug body having a body 20a having a circular cross section, fitted with an O-ring, and provided with an enlarged part 20b having a flange shape on the outer wall side, and 21, the base is fixedly supported by the plug body 20. A roughly shaped electric heating element that is powered from the outside, 22
is a specific shaft made of a head bolt inserted from the outer surface side of the plug body 20 through a packing 24 into a hole 23 passing through the hole 23 in the axial direction at a position eccentric to the center in the center of the plug body 20;
Reference numeral 25 denotes a cantilever type hook in which a proximal end 25a is screwed onto the helical shaft 22a of the ratio shaft 22 from its distal end side.

In FIG. 7, reference numerals 26a and 26b are locking members that prevent the cantilever hook 25 from rotating, which is protruded from the inner surface of the plug body 20.

A cantilever type hook 25 whose proximal end 25a is supported eccentrically with respect to the plug body 20 by the screw shaft portion 22a of the specific shaft 22 is provided to protrude from the plug body 20 as shown in FIG. The two locking members 26a and 26b restrict the rotation, for example, in a substantially perpendicular angular range, and in the figure, it is shown by the imaginary line that is stopped by one of the locking members 26a. At the counterclockwise position A, the tip 25b of the cantilevered hook 25 is located radially inward from the outer periphery of the body 20a of the stopper 20, while the solid line held by one locking member 26b is At the hour hand position opening indicated by , the length and eccentric support position of the cantilever hook 25 are set so that the tip 25b is at a position equal to the outer periphery of the enlarged portion 20b of the stopper 20.

When installing the electric heating element 21, as shown in FIG.
Move the cantilever hook 25 to the counterclockwise position A (see Figure 7).
With the electric heating element 21 inserted into the cooling water passage 30 through the through hole 29 provided in the outer wall 28 of the cooling water passage of the engine block 27, the body 20a of the plug body 20 is fitted into the through hole 29. match.

Next, when the ratio shaft 22 is tightened as shown by the arrow R in FIG. 7, the cantilevered hook 25 is rotated by the locking member 1 held by one of the locking members 26b, as shown in FIG. move,
When the ratio shaft 22 is further tightened, the cantilevered hook 25 is moved in the axial direction of the ratio shaft 22 to prevent further rotation, and as a result of this movement, the cantilevered hook 25 is moved in the axial direction of the ratio shaft 22. The periphery of the through hole 29 in the outer wall 28 of the cooling water passage is strongly clamped, and the clamping force fixes the plug 20 to the outer wall 28 of the cooling water passage.

In this case, the body 20a of the stopper 20 prevents the stopper 20 from tilting, and the O-J ring of the body 20a seals the cooling water passage 30 from the outside.

Additionally, the gasket 24 between the head 22b of the ratio shaft 22 and the outer surface of the plug body 20 is pressed between the two to seal off the cooling water that is about to leak from the insertion hole 23.

In addition, the button L in FIG. 8 is a cylinder liner, and the button C is a cylinder.

As is clear from the above, in the present invention, the outer wall of the cooling water passage is clamped by tightening the specific axis between the enlarged part of the plug and the cantilevered hook. The plug can be fitted into the through hole without being hindered by the hook, and the cantilevered hook can reliably prevent the stopper from coming off, and its assembly significantly improves ease of assembly. In addition, since the electric heating element inserted into the cooling water passage does not need to be rotated or swung significantly during assembly, the electric heating element can be shaped to be optimal for heating the cooling water passage.

The shape of the button, the shape of the cantilever hook in the above embodiment, and especially the structure of the tip part are not limited to these, and
It is not necessarily necessary to provide a pair of locking members; in short, as long as the tip of the cantilever hook can be brought into contact with the inner surface of the outer wall of the cooling water passage when tightening the ratio shaft, it is possible to use a locking member. Various modifications and applications are possible within the technical scope of the present invention, such as providing a ratio shaft and multiple cantilever hooks threaded onto it.
not.

[Brief explanation of drawings]

1 to 5 are side views for explaining a conventional electric heating body mounting structure, FIG. 6 is a cross-sectional side view of a main part of an engine starting assist device according to an embodiment of the present invention, and FIG. 8 is a front view, FIG. 8 is a sectional view of the outer wall of the cooling water passage of the engine block, showing the state before the plug is fixed, and FIG. 9 is the state after the plug is fixed. 20... Plug body (20b... enlarged part), 21... Electric heating element, 22... City shaft (22a... spiral shaft part), 25...
...Cantilever hook, 26a, 26b...locking member,
21... Engine block, 28... Cooling water passage outer wall, 29... Through hole, 30... Cooling water passage.

Claims (1)

[Scope of utility model registration request] An O-ring is fitted into the body having a circular cross section, and the base of a roughly shaped electric heating element 21 which is supplied with power from the outside is fixed to a stopper 20 which has an enlarged part 20b by enlarging the outer wall into a flange shape. The plug body 20 is inserted into a hole 23 that supports the plug body 20 and extends through the hole 23 in the axial direction at a position eccentric to the center of the plug body 20.
A stop shaft 22 made of a headed bolt is inserted through a gasket 24 from the outer surface side of the plug body 20, and the base end portion 2 is inserted from the distal end side into the helical shaft portion 22a of the stop shaft 22 on the inner surface side of the stopper body 20.
A pair of locking members 2 for preventing the rotation of the several cantilever type hooks 25 are provided.
6a and 26b are provided, and in position A, where the cantilever hook 25 is abutted by one of the locking members 26a, the tip 25b of the cantilever hook 25 is radially inward from the outer periphery of the body 20a of the plug body 20. On the other hand, one locking member 26b
At the position opening which is stopped by the tip 25b, the stopper 2
With the electric heating element 21 inserted into the cooling water passage 30 through the through hole 29 provided in the outer wall 28 of the cooling water passage of the engine block 27 so as to be at a position approximately equal to the outer circumference of the enlarged part 2Qb of the The body portion 20a of 20 is inserted into the through hole 29.
After fitting the stop shaft 22 to the cantilever type hook 25
Cooling water flows between the enlarged portion 20b of the stopper 20 and the cantilevered hook 25, which is tightened to the extent that it hits one of the locking members 26b and is prevented from rotating and moved in the axial direction of the stop shaft 22. An engine starting aid device characterized in that the periphery of a through hole 29 in a passage outer wall 28 is strongly clamped.